A mechanism and method for pressure-forming teeth on the periphery of a cylindrical workpiece, the mechanism including support members for a planetary gear set wherein the planet pinions serve as toothed forming rolls driven by the outer ring gear, and a workpiece on which gear teeth are to be formed serves as the sun member mounted at the center of rotation of the toothed forming rolls. A punch assembly is mounted adjacent each end face of the workpiece, each punch assembly including (1) a punc...

Magnetic forming apparatus is described in which a conductive forming coil is formed in a generally cylindrical single turn, and wherein a pair of generally parallel flat conductors are connected to the adjacent ends of the coil and extend axially of the coil.

A flex ring forming tool, forming apparatus, and method of cold-forming a profiled workpiece through radial material flow is disclosed wherein the flex ring has an internal profile complementary to the profile of the finished workpiece and wherein the lands of the flex ring forming profiles have uniform, relatively narrow widths from the minimum depth leading ends to the maximum depth trailing ends of the profiles while the widths of the forming profiles at a given radial distance from the cente...

A form roll of hard material, such as cemented tungsten carbide, for example, is mounted on a driving shaft. A bar-like key engages a hole in the shaft and notches in the roll and is engaged by a screw which clamps the key to the roll. A split sleeve is forced between a cylindrical central bore in the roll and a tapered portion on the shaft which the roll surrounds.

A stretch assembly or fixture for tensioning sheet metal stock in conjunction with draw forming. The stretch assembly supports the lower or bottom die member and has two upright stretch units, one on each of two opposite sides of the die. Each unit includes a work gripping head movable vertically relative to frame structure of the unit. A jaw assembly of each head is adapted to engage one of two opposite edges of a metal sheet to be formed and is movable relative to its head transversely of the ...

A hydrodynamic method and apparatus are provided for forming tubular members useful in reverse-osmosis apparatus. A conventional film-forming liquid is forced through a tubular support by a pressurized column of gas to form a film of liquid on the inner wall of the tube. The liquid is then cured to solidify the film of liquid in tubular form. The disclosed hydrodynamic method and apparatus make possible an advantageous reverse-osmosis process and apparatus for recovering water of a low-salt conc...

A single integral web of loose fibrous material having a nonuniform cross-sectional thickness is formed on a carrier moving at a uniform rate by causing first and second quantities per unit time of loose fibrous material to be conveyed by air and deposited on first and second different portions of the carrier.

Method of and apparatus for the shock-wave forming of metallic and other workpieces in which an electrical discharge in a liquid produces a shock wave, preferably in a power jet directed against the workpiece. The discharge is produced between a pair of permanent electrodes with a gap between them temporarily bridged at least in part by a fusible conductor. The electrical supply preferably includes at least one high-voltage, low-current source for initiating the discharge and at least one high-c...

A hollow spherical article having at least two substantially diametrically opposed apertures in the spherical surface, said article being of wrought metal and having been moulded by explosive forming. The article may further comprise at least two cylindrical portions, said portions being located on the spherical surface and defining said apertures. The method of forming the hollow spherical article comprises placing a tube of wrought metal into a die, positioning a plurality of explosive charges...

In a method for cryogenically forming a sheet of aluminum or a solid solution strengthened aluminum alloy wherein the sheet has a maximum thickness of about 0.2 inch, said method comprising forming said sheet into a shaped article of desired configuration by deforming said sheet at a cryogenic temperature in the range of about minus 100.degree. C. to about minus 200.degree. C., the improvement comprising: (a) work-hardening the sheet to at least about 25 percent of maximum hardness prior to the ...